Grosse Ile Municipal Airport
ONZ · KONZ · Detroit/Grosse Ile, MI · Non-towered · Print kneeboard
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Weather
METAR observed
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TAF forecast
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Sun & FAA night2026-08-03 · night begins 09:21 PM
| Event | Local (EDT) | UTC |
|---|---|---|
| Morning civil twilight Loggable night ends | 05:56 AM | 09:56Z |
| Sunrise | 06:28 AM | 10:28Z |
| Sunset | 08:49 PM | 00:49Z |
| Evening civil twilight Loggable night begins | 09:21 PM | 01:21Z |
Plan a flight from KONZ
Past 24 hours category · wind · ceiling · visibility trends
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Density altitude today projected curve · departure window · takeoff roll
Winds aloft NOAA forecast · 3,000 to 53,000 ft
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Advisories
NOTAMs
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Pilot reports
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Airspace hazards
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Runways
RWY 17LEFT traffic
- Heading
- 174° mag · 167° true
- Dimensions
- 4,424 × 75 ft
- TPA
- 1,600 ft MSL (≈1,000 AGL) · standard
- Surface
- Concrete
- Lights
- 4-light PAPI (left) (3°)
- Displaced thr
- 672 ft
- CTAF
- 123.0
Enter the left downwind (heading 354°) on the 45° at 1,600 ft MSL (≈1,000 AGL).
More details — RWY 17
- Threshold elev
- 581 ft
- Markings
- basic
- Approach obstacle
- Trees, 80 ft, 1,180 ft from threshold, 40 ft R of centerline — 12:1 slope to clear · penetrates the 20:1 visual approach surface
- Threshold crossing height
- 26 ft
- TDZ elevation
- 580 ft
Pattern side + displaced threshold: FAA NASR · TPA standard 1,000 ft AGL (not charted) · layout: FAA runway-end coordinates
| Runway | Length | Your margin |
|---|---|---|
| 04/22 | 4,846 ft | |
| 17/35 | 4,424 ft |
Prefer one flat page? Full runway details for KONZ → · New to pattern entries? The 45° entry, explained → · Teaching here? Print the KONZ kneeboard →
Comms & NavAids
Communication frequencies
Before taxi
Taxi & takeoff
Departure & arrival
“Detroit”ATC assigns the exact frequency (in your clearance or on handoff) — which one depends on your SID (departing) or STAR (arriving).
By procedure & sector (1 frequencies)
| Frequency | Used by |
|---|---|
| 284.0 | APCH/P DEP/P |
Source: FAA NASR (current 28-day cycle).
Nearby navigation aids
DXO 113.40 · CRL 115.70 · SVM 114.30 · +1
| NavAid | Type | Freq · ch | Range | Radial / Dist magnetic |
|---|---|---|---|---|
| DXO · Detroit | VOR/DME | 113.40 · 81X | High | r133° / 11.4 NM |
| CRL · Carleton | VOR/DME | 115.70 · 104X | High | r080° / 13.5 NM |
| SVM · Salem | VORTAC | 114.30 · 90X | Low | r137° / 26.7 NM |
| MTC · Selfridge | TACAN | 133.70 · 64X | — | r211° / 34.1 NM |
Prefer one flat list? All KONZ frequencies →
Charts & procedures
Lowest minimums here: RNAV (GPS) with vertical guidance · VFR sectional →
Airport info
From the field
Do you run KONZ, or an FBO, flight school, or shop on it? Claim your listing to keep fuel, fees, hours, and services current.
Airport information
- ICAO / IATA
- KONZ
- Coordinates
- 42.0991, -83.1615
- Elevation
- 590 ft MSL
- Magnetic variation
- 7W
- Sectional chart
- DETROIT
- Airport use
- Public
- Control tower
- No
- Weather station
- AWOS-3P · 119.675 · ☎ 734-692-9686
- ARTCC
- CLEVELAND (ZOB)
- Flight service (FSS)
- LANSING · 122.2 · 1-800-WX-BRIEF
- NOTAM facility
- ONZ
- Attendance
- MON-FRI 0800-1800; SAT-SUN PRIOR ARNGMT
- Beacon
- white-green (SS-SR)
- Segmented circle
- Yes
- Wind indicator
- lighted
- Activated
- 1941/05
- Distance from city
- 2 S
Night operations
- Airport lighting
- SEE RMK
- Rotating beacon
- white-green · SS-SR
- Pilot-controlled lighting
- ACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF. on 123.0 — Chart Supplement ↗
Runway lighting aids — 04: 4-light PAPI (left) · 22: 4-light PAPI (left) · 17: 4-light PAPI (left) · 35: 4-light PAPI (left).
FAA night windows (civil twilight, loggable night §1.1, currency §61.57) are under Sun & FAA night in the Weather section.
Services fuel · repairs · oxygen · attendance
- Fuel available
- 100LL, Jet A
- Bottled oxygen
- NONE
- Bulk oxygen
- NONE
- Airframe service
- MAJOR
- Powerplant service
- MAJOR
- Parking
- tiedowns, hangars
- Other services
- Charter, Instruction, Rental
Ownership & management 2 contacts
Remarks FAA · 6 notes
General
- BIRDS & DEER ON & INVOF ARPT.
- ULTRALIGHT & PWRD PRCHT ACT INVOF ARPT.
- FOR CD CTC DETROIT APCH AT 734-955-1404.
Runways
- EXTSV PEELING & CRACKING - FOD HAZ.
Lighting
- ACTVT REIL RWY 04 & 22; PAPI RWY 04, 22, 17, & 35; MIRL RWY 04/22 & 17/35 - CTAF.
Obstructions
- APCH RATIO 20:1 TO DTHR.
Embed KONZ weather on your site free widget for schools, clubs & FBOs
Live METAR, flight category, and favored runway for KONZ — paste this into your website's HTML. It updates automatically and stays free.
More widgets — crosswind, E6B, density altitude — on the embed page.
Nearby airports
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Also nearby: MI53 Mills Field (private) (7 NM) · 78MI Carls Airport (private) (7 NM) · 99MI Newport Meadows Airport (9 NM) · 9MI2 Newport Woods Airport (private) (9 NM) · W87 Wickenheiser Airport (11 NM)
About KONZ
Grosse Ile Municipal Airport (ONZ · KONZ) is an airport in Detroit/Grosse Ile, MI, at 590 ft MSL. It has 2 runways, the longest 4,846 ft, with no control tower (pilot-controlled). This page shows live METAR/TAF weather, runway crosswinds, frequencies, navaids, and FAA charts for KONZ, refreshed from the Aviation Weather Center and FAA NASR.
Does KONZ have a control tower?
No. Grosse Ile Municipal Airport is a non-towered (pilot-controlled) airport; use the published CTAF/UNICOM in the Comms & NavAids section.
What is the longest runway at KONZ?
Grosse Ile Municipal Airport has 2 runways; the longest is 4,846 ft. See the Runways section for headings, surface, and lighting.
Where is KONZ?
Grosse Ile Municipal Airport is in Detroit/Grosse Ile, MI, at an elevation of 590 ft MSL. Coordinates: 42.0991, -83.1615.
Fly out of KONZ often?
Save KONZ as your home base in the SkyReady app for a one-tap Go/No-Go readiness brief, weather alerts, and automatic FAA currency — free to log.
Weather is live from the Aviation Weather Center; airport facility data is from the FAA NASR (28-day cycle). For planning and education only; always verify against official sources. Open KONZ in a full tool: METAR/TAF decoder, crosswind calculator, sun & night times, or the density altitude calculator. Planning from here? Find the nearest airport with fuel or an approach, or check whether an IFR alternate is required.